MIL-HDBK-1164
Table 27
Maintenance Checklist for Flow, Pressure, and Level Sensors
Inspection
Action
(1),(2)
Flow sensors
Venturi-type
devices
Annular
Flush and clean annular chamber, throat
Q
chamber
and inlet; purge trapped air from chamber
and connecting piping; flush piezometer
pressure taps.
Exterior
Clean and paint as necessary.
A
Interior
Check interior for corrosion; dismantle,
A
clean, and restore smoothness of interior
surfaces as necessary; for flanged joints,
check possible intrusion of gasket into
interior; replace if necessary.
Orifice plates
Remove plate, dress off roughness; flush
A
sediment traps.
Pitot tube
On permanent installations, check tips
Q
and clean.
Flow tube
Check instrument taps; flush if necessary.
Q
Pressure sensors
Diaphragm
Disassemble and check for condition and
A
leaks; also clean, adjust, repair, or renew
as necessary; check calibration.
Bourdon tube
Check calibration, clean and adjust as
A
necessary.
148
Previous Page
